I installed 6 new 3157 led bulbs on the back of my '07 H2 for turn signal and brake lights (mine has the lights in the bumper too). Well, since the factory flasher thinks there is a problem it flashes them at about 90mph..really fast in turn signal mode. In 4 way flasher mode they blink normally. I went to the hummer dealer and they said the H2 flasher goes through the evm (?) and I can't use an after market electronic flasher to correct the resistance problem. Anybody know of any fixes to get the turn signal speed back to normal? I like the way the led bulbs look and want to keep them but the super fast flash I do not like.

 

I saw the resisters at AZ. It's where the bulbs are, on the top right.

 

Pretty sure they're controlled by the BCM (Body Control Module) and not the ECM (Engine Control Module)...sounds like a weird probelm, though, I don't know of any fixes.

 

There's not enough load on the flasher circuit, that's one of the problems using LEDS.

 

Got the resistors today from AZ..it says to put one on each bulb and I have 6 3157's back there so i'm gonna try installing 1 pair first and see what happens.

 

1 pair of resistors did the trick..now i'm back to blink.......blink.......blink not blinkblinkblinkblink